Forster was established as a shoemaker in Oxford by 1380, when he paid the comparatively small sum of 1s. as poll tax. In August 1389, when first in office as bailiff, he was wounded while attempting to arrest John Coughwhel of Watlington, ‘a common disturber of the peace, a brawler and a malefactor’, who had already attacked several citizens with a sword. Coughwhel ‘would not surrender himself, but resisted the bailiff and took him by the neck and held him with force, so that he drew blood’.
Forster was a trustee of the property used to endow Gerland’s chantry in the church of St. Mary the Virgin, but in 1392 he and his associates transferred it to Oriel college, which thus became responsible for the maintenance of the chantry.
